Plug-Ejecting Hole Saw
When using a hole saw, the sawn-out plug of wood always seems to get stuck inside the hole saw. Prying out the plug is a nuisance. With Vermont American's plug-ejecting hole saw, all you need is a reversing drill to "power" the plug out automatically. Mere's how it works: After cutting a hole, you cant the bodv of the hole saw in the hole to jamb it tight, then reverse the drill. A reverse thread on the hole-saw spindle pushes the plug out of the hole-saw body. The hole saw is available from 7/s-in. dia. up to 2'/2-in. dia. (Price: SI7.80, %-in. to $22.50, 2'/2-in.) MVennont American Tool Co., Dept. AWT, P.O. Box 340, Lincoln ton, NC 28093, (704) 735-7464.
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THIS book is one of the series of Handbooks on industrial subjects being published by the Popular Mechanics Company. Like Popular Mechanics Magazine, and like the other books in this series, it is written so you can understand it. The purpose of Popular Mechanics Handbooks is to supply a growing demand for high-class, up-to-date and accurate text-books, suitable for home study as well as for class use, on all mechanical subjects. The textand illustrations, in each instance, have been prepared expressly for this series by well known experts, and revised by the editor of Popular Mechanics.